Recent cluster-model calculation predict that $\alpha$ condensed states emerge in self-conjugate $N=4n$ nuclei. In the $\alpha$ condensed states, all of the $\alpha$ clusters are condensed in the lowest orbit, and their matter density is as low as 1/4--1/5 of normal nuclear states. Therefore, observation of the $\alpha$ condensed states is very important for clarifying physical properties of...
This research presents the calculated results of the thermal neutron inelastic scattering cross sections of Bismuth and Sapphire crystals. In this calculations, the effects of thermal neutron scattering on crystal’s phonon vibration and lattice parameters were taken into account by using the NJOY code. This calculated results were updated into the related ACE format data file for MCNP...
Laser wakefield acceleration is a novel concept for particle acceleration which can provide for a significant reduction of the accelerator length compared to conventional accelerators. The main issue in this field is a lack of control over the injection of electrons into the wakefield, resulting in a large spread in energy of the accelerated electron bunches. For producing this particular...
New and next generation RIB facilities provide new insight into the nuclear structure and reaction dynamics of exotic nuclei. However, many of the most interesting species are always produced with very low intensities. Active target Time Projection Chamber (AT-TPC) is one powerful device with several significant features, including 4π acceptance of the reaction products, full detection...
Experimental studies on single-event effects of static random access memories (SRAMs) with different feature sizes were carried out at 100 MeV cyclotron proton accelerator of China Institute of Atomic Energy. Single-event upset (SEU) cross-section curves with different proton energies and different incident angles were obtained for three SRAMs. The effects of incident proton energies and...
The generalized parton distributions(GPDs) is constructed in the high limit of the virtuality. The leading twist is only considered to make the process factorizable. In this presentation the higher twist order, cat’s ears contribution, is included to confirm the correction in the low virtuality. To solve the integration with complicated singularities and to avoid the regularization problem, we...
The black hole accretion disks contain highly ionized Fe, including C$_{IV}$, N$_V$, and O$_{VI}$ at a temperature of about $10^8$K. The relatively hot accretion disk ($10^8$K) and the relatively cool surrounding medium ($10^6$K) are mixed and the iron is ionized and recombined to release the X-ray. This paper investigate the physical properties of turbulent mixing layers and the production of...
CT image ring artifacts are caused by the unsatisfactory response of detector pixels, which degrades the reconstructed image and affects the subsequent processing and quantitative analysis of the image. A novel algorithm based on deep learning is proposed to correct CT ring artifacts. The proposed correction procedure includes the following steps: (1) transfrom the training reconstructed...
Proton charge radius puzzle is a big problem that the size of protons measured by electron scattering and hydrogen spectroscopy is different from the size of protons measured by μ hydrogen spectroscopy. To solve this problem, we are going to perform proton charge radius measurement by electron-proton elastic scattering using a low energy electron linear accelerator at ELPH, Tohoku University....
We will present our recent study of tetraneutron(4n) by using the 8He(p,2p) reaction with inverse kinematics, which was performed at RIKEN RIBF facility in 2017.
Many-neutron systems, in particular the tetraneutron, have attracted lots of attention in the last decades. Their existence of itself, whether as bound or resonate state, is of fundamental importance in nuclear physics, serving as a...
A (p,n) reaction experiment on two N=Z nuclei, Cr-48, was performed in RIBF. In this study, we used inverse kinematics with 190MeV/u Cr-48 beam. We would like to make missing mass spectra using time of flight of neutrons. As neutrons are quite easy to pass through materials and heavy particles carrying up to 190MeV/u don’t loss much energy in liquid hydrogen, a 6mm-thick liquid hydrogen target...
The Rare RI-ring is a newly constructed mass storage ring at RIKEN, built with the purpose of measuring the mass' of exotic nuclei, such as those produced during the r-process. In order to develop the rings mass measuring capabilities, in ring beam diagnostics is required. For this purpose, a large area, non-isochronous, position sensitive detector with low energy loss is being developed to...
Equation of States for Neutron Stars Constructed by Machine Learning from GW170817
In a nuclear physics study using high intensity RI beam, high resolution position and timing detector is required for particle discrimination. We are developing Parallel Plate Avalanche
Counter directory and independently reading out signals from strip electrodes, Strip Readout PPAC(SR-PPAC). It has no delay and high position resolution corresponding to strip size and charge resolution, and it...
There are two types of atomic nuclei: "stable nuclei" and "unstable nuclei". The unstable nuclei make up about 97\% of all nuclides, including those expected to theoretically exist. It has become clear that many of their characteristics such as shape and structure cannot be explained by the standard nuclear structure models. So far, the internal structure of the atomic nuclei have been...
$\alpha$ clustering is a well-known phenomenon in light nuclei where two neutrons and two protons strongly correlate to constitute an $\alpha$ particle as a building block of atomic nuclei. A linear alignment of the $\alpha$ clusters, referred to as linear-chain cluster state (LCCS), has been of great interest since 1950s but until now there is no clear experimental evidence demonstrating the...
